Bleed-valve for air-brakes.



E. 0. HENTSCHEL & W. F. C. HARTING.

' BLEED VALVE FOR AIR BRAKES.

APPLICATION FILED MAY 3, 1915.

1,147,243. Patented July 20, 1915.

UNITED STATES PATENT oEEIo EDWARD o. HENTSCHEL, 0F CLEVELAND, AND WILLIAM F. c. HAETING, 0F ELiviwooD PLACE, OHIO,

BLEED-VALVE Eon AIR-BRAKES.

Application filed May 3, 1915. Serial No. 25,422.

To all whom it may concern Be it known that we, EDWARD O.HENT- SCHEL and WIILLIAM F. C. HARTING, citizens Our invention relates particularly to valves and means for tripping the same for use in discharging of air from the tank of an air brake. The valve might of course be used for other purposes, but the special object is as stated.

In devices of this nature, the object of this invention is to provide a valve which, when once unseated, will be held unseated by the escaping air, and to so place this valve that a small movement of it will unseat it.

It is also an object of this invention to provide for convenient access to such valve for the purposes of cleaning, and to provide a means of tripping the valve that is normally disconnected from the valve proper, and mounted outside of the casing of the valve chamber, so that there need be no journals and stufiing boxes in the valve chamber, to leak or become out of repair, and also so that if the valve tripping mechanism becomes out of repair it will not be impossible to bleed the brake without first repairing the valve tripper.

These objects we accomplish by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed, wherein the valve is mounted within a casing, on a sloping seat, and the valve tripping hammer is mounted outside of the casing and is adapted to strike the valve from its seat by insertion through the valve port. I y

In the drawings, Figure -1is aside elevation of the device'in position for use. Fig.'

2 is a longitudinalvertical section of the device on a larger scale. Fig. 3 is a front elevation of the device with the protecting casing or shield over the hammer spring partially cut away.

The device is mounted on an a1r tank 1, by means of a standard threaded portion 2 Specification of Letters Patent.

PatentedJuly 20, 1915.

having a passageway 3 therein which, is screwed into the a1r tank. The casingt of' the valve is rhomboldal 1n cross section, and

has a top 4, a bottom 5, a front end 6, a rear end 7 and sides 8 and 9. There are two fixed shaftsor pins mounted across the chamber, and, the shaft 110 for the valve disk is secured in fixed position bythe nuts 11, 11, at the sides of the chamber casing. The shaft 12 for the valve engaging member is likewise held by nuts 13, 13, at each side of the casing.

The valve disk 14, which has a rubber contact facing 15, has a collar portion 16 for pivotally'mounting it on the shaft 10. The

link 17, which serves as a regulating mem"- ber for the valve, is pivotally and slidab1y mounted on the shaft 12 by means-of an elongated slot 18,, formed at one end thereof, the other end being pivotally secured to'the valve at 19. I

The seat of 'the valve disk is around an outlet port 20, which is formed in the sloping side 6 of the chamber casing, the chamber wall being'undercut around the seat. The inlet port 3 in the screwthreaded fitting 2 above mentioned is continued into the easing through a bent tubular portion 21, that directs the inflow of air when the bleeding operation is going on, along a line parallel with the undercut valve seat referred to, and when the valve is tripped by a small movement the air will hold open the valve, and I escape through the outlet 20 until. there is not suflicient-air to hold up the valve. The link portion 17 is made of metal preferably fairly heavy, so that it will help the valve to seat by gravity, the play in its slotted mounting being for the purpose of making it free to slide as well as swing on its shaft so that it will surely fall whenbleeding is completed. The pressure of the air will positively insure that the valve will not be jarred off of its seat, it working just as much to hold the valve closed as to hold it open .once it is shifted beyond the line given the flow of air by the tubular inlet 21.

The rock shaft is journaled in bosses 26, 26, at each side of the front wall of the casing,

and at one end the shaft has an operating handle 27 pinned onto it, said handle having the two forked ends 28, 28, for purposes of operation, as is familiar in the bleeding valves now in general use. A spring 29 is mounted around the shaft, bearing on the two lugs at the sides and the hammer at the center, and serves to hold the ham mer away from contact position with the valve disk, as will be noted hereinafter. A metallic guard 30, of any desired character, is provided, so constructed that it will snap into place over the lugs mentioned.

To operate the valve, the handle 27 is pulled or pushed, dependent upon which end it is being worked from, which will cause the end of the hammer to swing in through the port 20 and strike the valve disk. The point of contact is protected by the screw 31 which is used to mount the rubber facing referred to, and a small quick throw of the hammer will strike up the valve disk so that the escaping air will pass beneath the disk thereby raising it to its fullest extent.

It is believed to be clear that the elements of quickness, security and efficiency above pointed out are provided in the structure now fully described, and it is desired to note that mechanical changes suggested by the various features of this device are intended to be covered by the claims, although the possibility of such changes was not pointed out during the progress of the description of parts.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is z- I 1. In a device of the character described, in combination with a casing, an inlet port, and an outlet port, a pivoted valve closure over the outlet port, with the inlet port located so that upon opening the valve it will lie in the line of air escaping through said inlet, and means mounted outside of the casing, and adapted to be projected into the outlet port, to unseat the valve.

2. In a device of the character described, in combination with a casing, an inlet port, and an outlet port, a pivoted valve closure over the outlet port, a loosely mounted member in engagement with the valve closure for reseating the said closure, with the inlet port located so that upon opening the valve it will lie in the line of air escaping Copies of this patent may be obtained for through said inlet, and means mounted outside of the casing, and adapted to be projected into the outlet port, to unseat the valve.

8. In a device of the character described, in combination with a casing having a sloping wall, and an inlet port and an outlet port, said outlet port being formed in the sloping wall of the casing, a pivoted valve closure for the outlet port, with the inlet port so directioned that the entering air will fiow in a line substantially parallel with the sloping wall, whereby a slight raising of the closure will enable the entering air to hold said closure away from the outlet port, and means mounted outside of the casing and adapted tobe projected into the outlet port, to unseat the valve.

4. In a device of the character described, in combination with a casing having a sloping wall, and an inlet port and an outlet port, said outlet port being formed in the sloping wall of the casing, a pivoted valve closure for the outlet port, with the inlet port so directioned that the entering air will flow in a line substantially parallel with the sloping wall, whereby a slight raising of the closure will enable the entering air to hold said closure away from the outlet port, and a pivoted hammer so positioned that it will project its nose into the outlet port, to unseat the valve.

5. In a device of the character described, a casing, an inlet and an outlet port therein, a sloping seat about the outlet port, a closure for the outlet port adapted to find said sloping seat, the inlet port so directioned that the entering air will take a path substantially parallel with the sloping seat, means for striking up the valve closure and a finger hole in the casing with a plug therefor.

6. In a device of the character described, a casing, fixed pins mounted in the casing, a valve pivotally mounted on one of the pins, link member connected to the valve and mounted on the other pin, a fitting on said casing to screw into an air chamber, an inlet port through said fitting, an outlet port, a closure for said outlet port pivotally mounted over the inlet port, and means mounted on the outside of the casing and adapted to be projected through the outlet port to unseat the closure from said outlet port, as and for the purpose described.

EDWARD O. HENTSCHEL. WILLIAM F. C. HARTING.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

